Safety attachment for gas stoves or ranges.



Patented Dec. 5, I899..

W. DE FREITAS.

SAFETY ATTACHMENT FOR GAS STOVES 0B RANGES.

(Application filed Sept. 2, 1898.) (No Model.) 2 Sheets-Sheet I.

71-45 Nana's Farms 00, wore-urn" wnsnmsrcn. c. c.

N0. 638,50l. Patented Dec. 5, I899.

w.- DEYFREITAS. I SAFETY ATTACHMENT FOR GAS STO YES 0R RANGES.

' (Application filed Sept. 2, 1898.) (No Modal.) 2 Sheets$heet 2.

WITNESSES: INVENTOR',

ATTORNEY I the rains FFEEe WILLIAM DE FREITAS,'OF NEW YORK, N. Y.

SPECIFICATION forming part of Letters Patent No. 638,501, dated December5, 1899 Application filed September 2, 1898. Serial No. 690,102. (Nomodel.)

To all whom it may concern:

Be it known that I, WILLIAM DE FREITAs, a citizen of the United Statesof America, residing at New York, in Manhattan borough, county of NewYork, and State of New York, have invented certain new and usefulImprovements in Safety Attachments for Gas Stoves or Ranges, of whichthe following is a specification.

My invention has reference to improvements in safety attachments for gasstoves, ranges, or other heaters which are so applied to the pipes forconducting the gas to said heaters that there may be the least possibledanger of explosion from escaping gas.

The object of my invention is to provide means whereby the cooks of thebranch pipe may be turned on or 0% without affecting each other or themain cook or that of the feed-pipe; but when said feed-cock iscompletely turned off there will also be a complete turning off of allthe cocks in the branch pipe, thus preventing leakage of the gas fromthe cooks beyond the feed-cock.

My invention consists, essentially, in securing to the plugs of theseveral cocks plates provided with curved slots combined with a barconnecting said plates by means of pins extending through said slots,whereby each branch-pipe cock can be turned in either direction withoutaffecting any of the other cocks; but when said bar is movedlongitudinally by the closing of a feed-cock the pins on said bar willbear on the corresponding end of each slot and rotate the respectiveplate and cock until the latter is closed.

The nature of my invention will best be understood when described inconnection with the accompanying drawings, in which- Figure 1 representsa perspective view of a gas-range provided with my improvement. Fig. 2is a plan view, on an enlarged scale, of the feed-pipe and cooks andintermediate connections. Figs. 3, 4, and 5 are details. Fig. 6 is adiagram illustrating the course of the valve-plates and the pins on theconnectingbar.

Similar letters of reference designate correspondingpartsthroughouttheseveralviews of the drawings.

Referring to the drawings, the letter A designates a gas-range of theusual construction, having surface and oven burners.

B is the feed-pipe, provided with branches 0 0, leading to theoven-burners, and with branches D D D, leading to the surface burners.The branches 0 and D are each provided with cocks E and F, respectively.The feed-pipe B, as usual, is provided with a main cock G for turning onand oif the gas to the range. To the plug I of each cock E is secured aplate H, preferably made in the form of a circular disk, which saidplate is provided with a socket a squared at one portion and fitted overthe correspondingly-shaped end of the plug I, thus insuring the turningof the plate when the plug is turned to open or close the cook. Theplate H is also provided with a concentric slot b. Above the plate H isplaced a segment K, provided also with a concentric slot 0 of the sameradius as the slot 19, said segment being provided with radial shoulders01 and adjustably secured to the plate H by bolts 6 passing through theslots b and c. To the plug of the main cock G is attached a slottedsector L, the slot f therein being about the length of a quadrant of acircle. The space between the ends (1 of the segment K should be aboutequal to a quadrant.

M is a bar provided with upwardly-projecting pins 9, passing through theslots 5 of the plates H and secured to the sector Lbyabolt g passingthrough the slot f. The segments K are so adjusted on the plates H thatthe pins 9 will be in contact with the right or upper shoulder d of thesegments K when the cocks B are closed and the main cock G is alsoclosed. By turning the main cock Gto admit gas to the feed-pipe noeffect is produced on the cooks E, as the pins g simply ride in theslots 17 in the plates H. If, however, one of the cooks E should byinadvertence have been permitted to remain open after admitting gas tothe burner through one of the branch pipes O, the shoulder 01 on thesegment K is in direct contact with the corresponding pin 9 on the barM, and consequently when the main cock G is turned the movement of therod M turns the plug 1 through a quadrant, as indicated in Fig. 6, andso closes off the admission of gas to the branch pipe. The other cook,

if properly closed, is not aitected by the movement of the bar M, as itspin 9 is in contact with the opposite shoulder 02 of the segment K.

In practice I have found that no two cocks have exactly the same rangeof motion for opening and closingthat is to say, either the plug doesnot turn through an exact quadrant or is not so set that it can beclosed without adjustable means, and it is for this reason that I haveprovided the adjustable segment K, which permits setting for accurateclosing of each and every valve.

The end of the bar M may be extended, as shown in Fig. 1, and providedwith a handle Zto provide for opening and closing all the valves fromthe front of the stove.

The slotted sector L on the plug of the main cock G permits the end ofthe bar M to be adjusted, and the sector is for the purpose of producingparallel movement of said bar in connection with the slots 1) in theplates H.

What I claim as new is 1. In a safety attachment for gas stoves, rangesand other heaters, the combination with the main supply-pipe and thebranch pipes O and D connecting respectively with the oven and with thesurface burners, of adjustable abutments connected with the valve plugsof the branches leading to the ovenburners, and aconnection between saidabutments and the main cock for closing the branch cooks for theoven-burners when the main cock is closed,substantia1ly as described.

2. In a safety attachment for gas stoves, ranges and other heaters, thecombination with the branch cocks, of slotted plates secured to theplugs thereof, segments adj ustably mounted on said plates to formabutments, a bar provided with pins entering the slots in the plates andadapted to engage with the segments, and a connection between said barand the main cock, substantially as described.

3. In a safety attachment for gas stoves, ranges and other heaters, thecombination with the main cook and the branch cocks, of slotted platessecured to the plugs of the branch cocks, segments adjustably mounted onsaid plates to form abutments, a bar provided with pins entering theslots in the plates and adapted to engage with the segments, a slottedsector connected with the plug of the main cock, and a connectionbetween said bar and said sector, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

WILLIAM DE FREITAS.

Witnesses:

EUGENIE P. HENDRICKSON, A. FABER DU FAUR, Jr.

